| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.eagle.query.aggregate.raw; |
| |
| import org.apache.eagle.log.entity.QualifierCreationListener; |
| import org.apache.eagle.log.entity.meta.EntityDefinition; |
| import org.apache.eagle.query.aggregate.AggregateFunctionType; |
| |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.Map; |
| |
| public class RawAggregator implements QualifierCreationListener,GroupbyKeyAggregatable { |
| private List<String> groupbyFields; |
| private GroupbyKey key; |
| private static final byte[] UNASSIGNED = "unassigned".getBytes(); |
| private RawGroupbyBucket bucket; |
| |
| public RawAggregator(List<String> groupbyFields, List<AggregateFunctionType> aggregateFunctionTypes, List<String> aggregatedFields, EntityDefinition ed) { |
| this.groupbyFields = groupbyFields; |
| key = new GroupbyKey(); |
| bucket = new RawGroupbyBucket(aggregateFunctionTypes, aggregatedFields, ed); |
| } |
| |
| @Override |
| public void qualifierCreated(Map<String, byte[]> qualifiers) { |
| key.clear(); |
| ListIterator<String> it = groupbyFields.listIterator(); |
| while (it.hasNext()) { |
| byte[] groupbyFieldValue = qualifiers.get(it.next()); |
| if (groupbyFieldValue == null) { |
| key.addValue(UNASSIGNED); |
| } else { |
| key.addValue(groupbyFieldValue); |
| } |
| } |
| GroupbyKey newKey = null; |
| if (bucket.exists(key)) { |
| newKey = key; |
| } else { |
| newKey = new GroupbyKey(key); |
| } |
| |
| bucket.addDatapoint(newKey, qualifiers); |
| } |
| |
| /** |
| * @return |
| */ |
| public Map<List<String>, List<Double>> result() { |
| return bucket.result(); |
| } |
| |
| public List<GroupbyKeyValue> getGroupbyKeyValues() { |
| return bucket.groupbyKeyValues(); |
| } |
| } |